consumer: Cannot connect to amqp://user:**#localhost:5672//: [Errno 111] Connection refused - docker

Question

I am trying to build my airflow using docker and rabbitMQ. I am using rabbitmq:3-management image. And I am able to access rabbitMQ UI, and API.
In airflow I am building airflow webserver, airflow scheduler, airflow worker and airflow flower. Airflow.cfg file is used to config airflow.
Where I am using broker_url = amqp://user:password#127.0.0.1:5672/ and celery_result_backend = amqp://user:password#127.0.0.1:5672/
My docker compose file is as follows
version: '3'
services:
rabbit1:
image: "rabbitmq:3-management"
hostname: "rabbit1"
environment:
RABBITMQ_ERLANG_COOKIE: "SWQOKODSQALRPCLNMEQG"
RABBITMQ_DEFAULT_USER: "user"
RABBITMQ_DEFAULT_PASS: "password"
RABBITMQ_DEFAULT_VHOST: "/"
ports:
- "5672:5672"
- "15672:15672"
labels:
NAME: "rabbitmq1"
webserver:
build: "airflow/"
hostname: "webserver"
restart: always
environment:
- EXECUTOR=Celery
ports:
- "8080:8080"
depends_on:
- rabbit1
command: webserver
scheduler:
build: "airflow/"
hostname: "scheduler"
restart: always
environment:
- EXECUTOR=Celery
depends_on:
- webserver
- flower
- worker
command: scheduler
worker:
build: "airflow/"
hostname: "worker"
restart: always
depends_on:
- webserver
environment:
- EXECUTOR=Celery
command: worker
flower:
build: "airflow/"
hostname: "flower"
restart: always
environment:
- EXECUTOR=Celery
ports:
- "5555:5555"
depends_on:
- rabbit1
- webserver
- worker
command: flower
I am able to build images using docker compose. However, I am not able to connect my airflow scheduler to rabbitMQ. I am getting following error:
consumer: Cannot connect to amqp://user:**#localhost:5672//: [Errno
111] Connection refused.
I have tried using 127.0.0.1 and localhost both.
What I am doing wrong ?

Answer 1

From within your airflow containers, you should be able to connect to the service rabbit1. So all you need to do is to change amqp://user:**#localhost:5672//: to amqp://user:**#rabbit1:5672//: and it should work.
Docker compose creates a default network and attaches services that do not explicitly define a network to it.
You do not need to expose the 5672 & 15672 ports on rabbit1 unless you want to be able to access it from outside the application.
Also, generally it is not recommended to build images inside docker-compose.

Answer 2

I solved this issue by installing rabbitMQ server into my system with command sudo apt install rabbitmq-server.